Adjustable work-holder.



1. J. VAN HUPFEL, Jil. ADJUSTABLE WORK HOLDER.

APPLICATION FILED DEO. l0, 1906.

933,799.v Patented sept. 14, A1909.

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ADJUSTABLE WORK-HOLDER.

Specification of Letters Patent. Patnbed Sept). 14, 1909.

Application filed December 10, 1.906. Serial No. 347,142.

i chines and it consists in the novel construction and arrangement ofits parts as hereinafter shown and described.

The object of the invention is to provide a work-holder which may beeasily and readily adjusted to center the work with relation to a latheor boring machine and which is so constructed as to properly retain thework in position. The holder consists primarily of a disk which may beattached to the shaft of a machine and which is provided with averticallyT adjustable shelf. The shelf is provided with a plate uponwhich the work is supported and which may be moved laterally along thesaid shelf. Means for moving the shelf and the plate are also provided.

In the accompanying drawing :-F igure 1 is a side view of the workholder. Fig. 2 is a face view of the same. Fig. 3 is a sectional view ofthe same cnt on the line 3--3 of Fig. 2, and Fig. et is a detail sideelevation of the end of a shifting screw used upon the holder.

The holder comprises the disk 1 which is concentrically mounted upon theshaft of the machine tool 2. The disk 1 is provided upon its face withthe elongated parallel tenons, 3, the vertical edges of which arebeveled. Said tenons are arranged upon opposite sides of the diameter ofthe disk 1.

The face of the disk 1 is also provided with the flanged grooves 4:which are located beyond the outer edges of the tenons 3 and whichextend parallel with the said tenons.

Movably mounted on the tenons 3 is a slide 5 from the bottom of which asupport or shelf 6 projects outwardly at a right angle thereto. The backof the slide 5 has mortises 7 in which the tenons 3 are dovetailed.Bolts 8, with their heads seated in the grooves A, project through theslide 5 and carry nuts in depressions in the face of said slide tofasten it to the disk 1 as usual.

The screw 9 is journaled for rotation upon the disk 1 and engages athreaded perforation provided in the slide 5 said screw being locatedbetween the tenons 3, 3. The supj port or shelf 6 is provided with thetransversely extending T-headed grooves 10 and the work supporting plate11 rests upon the shelf (3 and is provided in its upper face withT-headed grooves 12. The bolts 13 pass through the plate 11 and havetheir heads located in the grooves 10. The work 14 is held upon thecarrying plate 11 by the clamps 15 and bolts 16 in the usual manner. Thescrew 17 is journaled for rotation upon the shelf 6 and engages athreaded perforation provided in the plate 11. The screws 9 and 17 areprovided at their heads with radially disposed graduations such as 18which coperate with marks 19 for the purpose of indicating the extent ofrotation that each screw is subjected to. A counterbalance weight 20 isattached to the disk 1 by means of bolts 21, the heads of which lie inthe grooves A. rl`he weight 2O may be adjusted independently of the back5.

From the foregoing description it is oblvious that the support or shelf6 may be moved longitudinally of the tenons 3 by turning the screw 9 andthat the work carrying plate 11 may be moved transversely upon the saidshelf by the screw 17. Thus the work 14 may be positioned or centeredwith relation to the disk 1 and such positioning may be accurately andreadily done without the use of hammers or mallets. It is furtherobvious that by reason of placing the support or shelf on the outer endof the slide, the work carrying plate can be moved by means of the screw9 beyond the periphery of the disk 1 without becoming unsteady. Undercertain conditions this extensive outward movement of the work is ofgreat convenience and importance. Also, the counterbalance weight 20 maybe so adjusted upon the disk 1 as to preserve the equilibrium of thedevice and the work and thus reduce wear upon the journals and bearingsof the machine tool and vibration of the parts thereof.

Having described my invention what I claim as new and desire to secureby Letters-Patent is A device of the class described comprising a diskhaving on one facerspaced parallel tenons and formed in the said facewith the under-cut groove located one beyond each of the tenons, andparallel thereto, a

ceiving the tenons whereby to permit of sliding adjustment of said shelfdiametwork-supporting shelf having mortises rereally upon the face ofthe said disk, se-

Curing bolts having their heads seated in the grooves in the disk andextending through the said shelf member, nuts threaded upon the boltswhereby to hold the shelf` at adjustment, and a counter-balancecomprising a base plate, a Weight carried by the plate intermediate ofits ends, bolts passed through the plate at its ends and having theirheads seating in the said grooves inthe disk, and nuts threaded upon thesaid bolts whereby to permit of diametrioal adjustment of the saidcounter-balance independently of the work-supporting shelf In testimonythat I Claim the foregoing as my own, I have hereto affixed my signature'inthe presence of two witnesses. n

ISADORE J. VAN HUFFEL, J R.

IVitnesses:

ETHELA. ANDERSON, J oHN J. Sol-IINDLER.

